Car-door mechanism.



0. A..LII IDSTRUM.

GAE DOOR MECHANISM.

APPLICATION FILED APR.15,1908.

Patented Nov. 3, 1908.

2 SHEETSSHEET 1.

INVENTOR WITNESSES WPN G. A. LINDSTRfiM.

UAR DOOR MECHANISM.

tnvriran era-arias rarest enrich.

CHARLES A. LINDSTROM, OF PITTSBURG, PENNSYLVA KIA, ASSIGNOR TO PItlEISSED STEEL OAR COMPANY, OF PlTTSBL'ltG, PENNSYLVANl/t, A CORPORATION OF NEW JERSEY.

can -noon MECHANISM.

No. 902,749. Specification of Letters Patent. Patented Nov. 3, 1908. Application filed April 15, 1908. Serial N0.,427,193.

To all whom it may concern: i- 1 1 is an operating lever -arr ving pinion 12 Be it known that l CHARLES A. LIND- opeated by pawl 13 mounted on lever 11. sTRoM, of Pittsburg (North Side,) Allegheny i 14 is a pawl mounted on frame 15 which county, Pennsylvania, have invented certain frame 15 is rigidly secured to end sill 2. new and useful improvements in (Jar-Door 1 i7 is a gear operated by pinion 12 and Mechanism, of which the following is a full, l loosely mounted on shaft '18. integral with'oo clear, and exact. description, reference being gear 17, and hen/. 1 also loosely mounted on had to the accompanying drawings, in which a shaft 18, is a gear it) which meshes with and like characters refer to like parts, and in drives gear 9.

which is an arm rigidly mounted on shaft o Figure 1 is a plan view of substantially and carrying a pin 21 adapted to engage a one-tourth of a car embodying the present notch 22 formed in the peripheral surface 9 invention, a portion of the side tlange being in gear 9 and having a projecting abutment removed for clearness; Fig. 2 is a sectional or nose 9" on one side thereof. side elevation of the same; Fig. 3% is a detail 23 are pinions rigidly mounted on shaft 18 transverse section tl'n'ough the ear looking and meshing with teeth of latches 24. The toward the end, sl'towing relative position of latches 24 arcvslidably mounted in guides 25 the parts when the doors are elosed; Fig. 4 and riveted or secured to the side edge plate is a like view, the doors being open; Fig. 5 is or strip of the ear frame or to other suitable a like view showing the doors closed, the portion of the car-side structure. latch about to be operated, and Fig. ti is a 26 are cam shoes in line with latches 24, like view showing modifications of structure. both latches 24 and shoes 26 are provided An object of the present invention is to with oppositely inclined engaging faces. provide a modification of t he st rlu-tureslum'n There may be any suitable number of latches and described in my application for lietters for each of the doors.

Patent, entitled tar door operating mech- The operation of the structure thus far deauisms, tiled November 20, W07, Serial No. SQl'ibUtlIS as lollows:-Suppose the doors to 4(l2,tt), in which a door operating and lockbe open as shown in Fig. 4, the pawl 13 is ing mechanism is disclosed, comprising a thrown to the position as shown in Fig. 3 and door-closing shaft with suitable levers or the lever l1 ()3Glt1-t0tl toward 'the side of the arms thereon to I'ZliSU the doors, door-locking car. This will turn pinion 12 in the direction 8 shat't movable bodily intodooi tor-king posiof the arrow, (Fig. 4), gear 17 in the opposite tion and suitable eonneetions between the direction, and gear 9 in the same direction as two shal'ts whereby they are operated in pinion 122. Gear 17 being loosely mounted proper sequence. on shatt- 18, no motion is communicated to In the present structure, the door operatsaid shalt 18. As gear 9 rotates pin 2] caring shaft is not bodily movable but instead ried by alrm 2() slides over the peripheral sur- :1 system of latches is 'irovided adapted to be. taco t), at the same time link 8 is drawn upthrown intd locking position which aercises wardly turning shal't 3 and throu h the me.- a tinal lilting force on' the doors alter the dium of arms 4 bearing on shoes 0, the doors doors have been closed by their operating are elevated to the position shown in Fig. 5. 9-5 arms or levels. At the moment the doors reach the position Referring now in detail to the drawings% shownjn Fig. 5, pin 21 on arm 20 strikes the represents the car body, 2 the end sill, 3 the projecting abutment or nose 9 and is forced' door operating shaft, 4 the door lifting arms into notch 22, whereupon arm 20 is locked to carried thereby, 5 the doors, (5 wearing shoes gear 9 which as it continues to turn through mounted on the miderside of the doors. arm 20 rotates shaft 18, and pinions 23 7 is an arm rigidly mounted on operating throwing all oi the latches 24 forward into shaft 3, S a link for operatii'ig arm 7, 9 is a engagement with their respective shoes 26. gear for operating link 8 having a stop 10 As latches 24 cannot be deflected downthereon against which link 8 rests to prevent wardly, doors 5 must be forced upwardly excess movement of gear 9 when the latches into snug, closed position, thus preventing herein described have been thrown to the escape of lading around the periphery of the limit of their inward movement. 'door. Meanwhile, during the movement of 'underframe in front of said door, geared to beneath the pawl 13.

in the cam gear 9.,

following is what I claim to be new therein .35 and desire to secure by Letters Iatent:

the latches the linlrf'B, passes the center of gear 9 and strikes stop 10 which revents further movement of ear 9. T is final movement having the e 'ect of lowering the arms 4 from engagement'with shoes 6, thus effectively takin the weight. of the doors from the door-li ting means and throwing the entire wei ht of the doors and lading upon the door in es and latches. To open the doors, the paw is reversed and the lever ismoved in an opposite direction and notch displacin pin 21 and arm 20, thus rotating shaft 18 m the opposite direction and hence elevating arm 20 to lift it from notch 22 onto the peri heral surface 9% When in 21 reaches t e peri heral surface 9 the atches' have been with rawn from locking positions and link 8 has again )assed its dead center and instantly the weig Iii of the lading on the doors, forces them downwardly, arms i beirig depressed, shaft 3 rotated and gears 9, 19 and 1'? and pinion 12 running away from lever 11, the teeth of pinion 12 passing freely In Fig. 6 is shown a modification of the structure already described wherein a cam notch 27 is formed in the latch 24 instead of In this case a small gear or pinion 28 is rigidly mounted on the shaft 18 and meshes directly with the teeth of the gear wheel 9, the o eration of the mechanism beings'ubstantia ly' the same.

Having thus described my invention, the

'1'. In a car door mechanism, a drop door, a latch slidably mounted on the car underfrarne adjacent the edgeofsaid door and a rotatable shaft for projecting said latch into door-locking position.

2; In a car door mechanism, a plurality of drop doors, a plurality of latches slidably mounted on the car under-frame adjacent the edges of said doors and a rotatable shaft for projecting said latches into dooi supporting positions.

' 3. In a car door mechanism, a door and means foroperating said door, a suitably. mounted slidable latch having a cam surface and adapted to engage said door'and exert a, final closing pressure thereon. I I

4. In a car door mechanism, a door and means for operating said door, a slidable latch mounted on the edge ofthc car side in frontof said door and having a cam surface, said. latch being ada ted to engage said door and exert a final c osing pressure thereon and means for operating said latch. 5. In. a car door mechanism, adoor and means for o crating said door,: a rotatable shaft and a slidable latch mounted on the car said shaft and adapted to be projected thereby into door locking position."

6. In a car door mechanisiii, a door, and

means for operating said door, a cam-faced and a latch 'slidably mounted on the car underframe beneath the car side and in front of said door and means for operating said latch.

.8. In a car door mechanism, a door, means for "operating said door, .a slidable latch mounted on the car underframe in front of said door, and an intermittent gear interposed between said latch and door-operating means. 1

9. In a car door mechanism, a door, a gear for operating said door, it slidable latch, a shaft geared to said latch and an intermit- "teiiit gear interposed between said shaft and door gear.

1.0. In a car door-mechanism, a door, arm for raising said door, a slidable latch adapted to exert a final closing pressure on said door and disenga e said door from said raising and means "or operating said mechanism.

11. In a car door mechanism, a door, an

arm for raising said door, a slidable latch having cam surface, a shoe on said door in line with said latch, means for operating said door-raising arm and projecting said latch,

said latch being adapted to strike said shoe and exert a final closing pressure on said door to disengage the door from said arm.

12. In a car door mechanism, a drop door,

and a latch slidablymounted on the car underframe .beneath the car side, a-rotatable shaft also mounted beneath the car side and geared to said latch for projecting same into door-supporting position.

13. In a car door mechanism, a door, an arm for raising said door, a cam wheel geared to saidarm, a slidable latch, a shaft for operating said latch, anarm carried by said shaft in engagement with said cam wheel and means for operating said mechanism.

' 14. In a car door mech -.1is1n, a door and means for operating said door, a slidable latch mounted beneath the car side, suitable guides for said latch and a rotatable shaft for operating said latch.

15. In a car door mechanism, a door exsliding latcliesmounte'd on the car underframe adjacent the edge of said door and'a rotatable shaft for projecting said latches simultaneously across the edge of said door' into locking positions.

tending between the center and the side of 17. In a car door neclmnisn'i, a plurality an angle with relation to said door and means of drop doors, means for simultaneously operating said doors, a 'ilurallity of sliding latches mounted on. the car underfravme ad- 5 jaoent the edges of said doors and ii rotatable shaft; for simultenecmsly projecting said hitches across the edges of said doors into locking positions.

18. In a car door mechanism, a drop door, means for operating said door and a latch luwing a door-engaging surface disposed at;

l l l for projecting sziid latch to cause said surface to exert a final closing pressure on the door.

The foregoing specification signed at Mo- Kees Rooks, Allegheny county, Pennsylvania, this (3th day of April, 1908.

CHARLES A. LINDSTROM.

\"Vitnesses Tal. domes, H.-B. FlSHER. 

